Children shout slogans during a rally to promote peace on the Korean peninsula at the Unification Bridge near the border village of Panmunjom in Paju, South Korea,Thursday, March 21, 2013. North Korea has threatened revenge for the sanctions and for ongoing U.S.-South Korean military drills, which the allies describe as routine but which Pyongyang says are rehearsals for invasion. (AP Photo/Ahn Young-joon)